CD-Pxx-00-0 Series Duct Mount CO 2 Transmitter

Transcription

1 Installation Instructions CD-Pxx-00-0 Issue Date February 4, 006 CD-Pxx-00-0 Series Duct Mount CO Transmitter Application Requirements FCC Compliance Statement This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case the user will be required to correct the interference at his/her own expense. Canadian Compliance Statement This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications. Installation IMPORTANT: The CD-Pxx-00-0 Series transmitters are intended to provide input to equipment under normal operating conditions. Where failure or malfunction of the transmitter could lead to an abnormal operating condition that could cause personal injury or damage to the equipment or other property, other devices (limit or safety controls) or systems (alarm or supervisory) intended to warn of, or protect against, failure or malfunction of the transmitter must be incorporated into and maintained as part of the control system. Parts Included The duct mount CO transmitter is shipped assembled. It consists of three main parts: base and Printed Circuit Board (PCB), cover, and mounting flange with four screws (for probe depth adjustment). A conduit adaptor is also included. Mounting Location Considerations When selecting a location for the transmitter, note the following: The transmitter is designed for duct mounting in any position. The probe is best mounted in the return airstream. The device should penetrate the duct by a minimum of 3.0 in. (76. mm) to ensure the sensing part of the element is fully in the airstream. The transmitter should be placed in an area free of condensation. The transmitter is duct mounted using a flange. The mounting flange adjusts the distance between the probe and the inner duct wall. Fasten the mounting flange with the four screws as follows: 1. Loosen the probe retention screw, and separate the flange from the assembled unit.. Drill a hole 7/8 to 1 in. ( to 5 mm) diameter in the duct for the transmitter s probe. 3. Using the mounting flange as a template centered on the hole, drill four 1/8 in. (3.18 mm) holes for the mounting screws positioned as in Figure (4) 0.87 () 006 Johnson Controls, Inc. 1 Part No , Rev. A Center Hole 1.65 (4) Figure 1: Mounting Holes on the Flange Dimensions in. (mm) 4. Fasten the mounting flange onto the duct using the four screws provided. 5. Insert the probe a minimum of 3.0 in. (76. mm), and tighten the probe retention screw on the mounting flange.

2 Wiring Power Supply Requirements The transmitter requires a 4 AC/DC, Class power supply maintaining voltages of 18 to 30 DC or 0 to 30 AC. Although the power input includes a halfwave rectifier, using a DC supply is recommended to avoid excessive current peaks (current consumption: peak, 170 ma; average, 85 ma). 4 AC Power Supply Connections When more than one transmitter is connected to one 4 AC transformer, a common loop is formed at the controller, and the risk of a short circuit increases. All commons must be at the same potential. Note: To avoid a short circuit, isolate the 4 power supply by providing a separate transformer for each transmitter as shown in Figure. 4 AC Supply 4 AC Supply Output CO Transmitter Signals Controller ma or + - CO Transmitter ma or 0 Shared Common Line Figure : Connecting Separate AC Supplies (Recommended) If several transmitters share one transformer, the phase ( ) must always be the same at each transmitter to maintain polarity and avoid a short circuit via a shared common line at the controller, as shown in Figure 3. 4 AC Supply Supply Output CO Transmitter Signals Controller + ma or - 0 CO Transmitter + - ma or 0 Shared Common Line Connecting the Conduit Adaptor 1. Align the nut with the opening inside the enclosure, and hold it in place.. Insert the adaptor body into the transmitter conduit opening. 3. Manually tighten the adaptor into the nut, turning in a Clockwise (CW) direction (see Figure 4). Nut Adaptor Body Adaptor Figure 4: Inserting the Conduit Adaptor IMPORTANT: Do not overtighten the conduit adaptor to prevent damage or displacement of the PCB. 4. Insert the wires through the conduit adaptor body opening. 5. Tighten the adaptor onto the adaptor body by turning the adaptor in a CW direction. Wiring the PCB To wire the PCB s input and output connections: 1. Open the transmitter cover.. Insert the wire carefully through the conduit adapter and then strip 1/4 in. (6.35 mm) of the wire insulation to prepare the wire for connection to the terminal block. 3. Connect the 4 supply between the positive ( ) and negative () terminals as shown in Figure 5. Figure 3: Connecting One AC Supply to Several Transmitters (Not Recommended) CD-Pxx-00-0 Series Duct Mount CO Transmitter Installation Instructions

3 X6 0/4mA X7 ma 0 + Wiring the Relay Model CD-PR is shipped with a relay module. To wire the relay, refer to Figure 6, and attach the relay wires to the relay PCB s two screw terminals. Screw Terminals SERIAL COM X5 X3 Figure 5: Transmitter PCB 7 10 Configuring the Output The transmitter is capable of generating either voltage or current output. To select, refer to Figure 5, and: 1. Connect the common wire to Terminal 0.. Connect the other wire to: Terminal (for voltage output) Terminal ma (for current output) and configure the pins marked 0/4mA as follows: - 4 to 0 ma: connect the jumper so that it shorts the pins (default) - 0 to 0 ma: disconnect (do not discard) the jumper 3. If the unit has an optional relay accessory, follow the procedure described in the Wiring the Relay section and then reposition the cover. Connect to X5 Connect to X3 Figure 6: Relay PCB The relay has two setpoint values: the On level and the Off level. These provide hysteresis and desired control function. The On level must be higher than the Off level. When CO concentration is increasing, the relay closes at the On level, and the relay opens when concentration is reduced to the Off level. Note: The default relay setpoints are 1,000 ppm On and 950 ppm Off. Change these settings by entering new values using the Relay Setpoint Software ACC-CD-S. Setup and Adjustments Commissioning Johnson Controls Carbon Dioxide (CO ) transmitters come from the factory calibrated for the following: output signal (0 to 10) proportional to CO concentration (0 to,000 parts per million [ppm]) altitude range of 0 to 1,969 ft (0 to 600m) above sea level without compensation default relay output trigger point of 1,000 ppm CD-Pxx-00-0 Series Duct Mount CO Transmitter Installation Instructions 3

4 Altitude Compensation The sensors are calibrated for an altitude of 984 ft (300m) above sea level and are intended for applications within the range of 0 to 1,969 ft (0 to 600m) without compensation. For altitudes above 1,969 ft (600m) where optimum accuracy of the CO concentration measurement is essential, modify the Building Automation System (BAS) controller s Analog Input (AI) high range to compensate for sensor placement at other than the standard calibration altitude. Note: For altitude compensation, only adjust the AI high range. The AI low range should remain at zero. To do this, reset the,000 ppm value using the controller s Compensation Factor (CF) shown in Figure 7 or Figure 8 as follows: Corrected alue = CF x,000 For example, if the sensor is situated at an altitude of 3,000 ft (914.4m) above sea level, CF, from either Figure 7 or Figure 8, is The new value is calculated as follows: Corrected alue = (1.10)(,000 ppm) =,00 ppm CF ,000,000 3,000 4,000 6,000 7,000 Altitude (Feet) 1.30 Figure 7: Altitude Compensation in Feet Above Sea Level CF ,000 1,00 1,400 1,600 1,800,000,00 Altitude (Meters) Figure 8: Altitude Compensation in Meters Above Sea Level 4 CD-Pxx-00-0 Series Duct Mount CO Transmitter Installation Instructions

5 Troubleshooting General The transmitter is not field repairable. In the event the unit is not functioning properly, use the following checklist to identify the symptoms and determine a solution. 1. erify that the unit is mounted properly and the appropriate output jumper is selected.. erify that all wiring is correct. 3. erify that the power supply voltage level is 0 to 30 AC or 18 to 30 DC. Note: The diagnostic Light-Emitting Diodes (LEDs) shown in the lower right-hand corner of Figure 5 indicate operational status: 7 lights up if the self-diagnostics procedure detects an abnormality. 10 pulses to indicate that the device is operational. If the transmitter will not operate after completing these steps, replace the unit. Testing the Relay Module To confirm that the relay is operating correctly, perform the following procedure: IMPORTANT: To expose the sensing portion of the probe, loosen the probe retention screw, and remove the probe from the duct. After testing is complete, reinstall the probe, and tighten the probe retention screw. 5. Determine whether the contacts are open or closed. If the contacts are closed, the relay is functioning properly, and no further testing is necessary. If the contacts are open, increase the CO concentration by exhaling near the probe, looking for a change in the resistance value. If no change is noted, confirm that the CO concentration has been raised above the trip point. - Check the transmitter output signal with a voltmeter to make sure the signal has risen above the 1,000 ppm relay trip point. - If the output signal has not reached the trip point, it may be necessary to further increase the CO concentration. If the contacts are open after exceeding the trip point, replace the unit with the appropriate module, and restart this procedure. 6. Disconnect power to the transmitter. 7. Disconnect the multimeter from the relay terminals. 8. Reconnect the wires to the relay screw terminal. 9. Reconnect power to the transmitter. 10. Reposition the cover. 1. Temporarily shut off power to the unit.. Temporarily remove wires connected to the relay screw terminal. 3. Connect a multimeter to the relay terminals. 4. Read the resistance level to determine whether the contacts are open or closed. If the contacts are closed, replace the unit with the appropriate relay module, and restart this procedure. If the contacts are open, apply power to the transmitter. CD-Pxx-00-0 Series Duct Mount CO Transmitter Installation Instructions 5

6 Technical Data Product CD-Pxx-00-0 Series Duct Mount CO Transmitter Measuring Range 0 to,000 ppm CO Accuracy at 77 F (5 C) Non-Linearity Temperature Dependence of Output Long-Term Stability Response Time (0 to 63%) Operating Temperature Range Storage Temperature Range Humidity Range Transmitter Output Signal < ±[30 ppm CO +.0% of reading] (includes manufacturing deviation and drift). All accuracy specifications reflect testing the transmitters using high-grade, certified gases. Transmitters are intended for an altitude range of 0 to 1,969 ft (0 to 600 m) above sea level without compensation. < 0.5% of Full Scale < 0.056% of Full Scale/F (< 0.1% of Full Scale/C ) < ±5.0% of Full Scale/5 Years 1 Minute 3 to 113 F (-5 to 45 C) -4 to 158 F (-0 to 70 C) 0 to 85% RH (non-condensing) CO Jumper Selectable: 0 to 0 ma or 4 to 0 ma or 0 to 10 DC (Default) Maximum Output Current: 5 ma; Maximum Output : 1.5 Relay Output (Optional) Maximum 30, 0.5A, Class Recommended External Current Output: Maximum 500 ohms Load Resistance Load Output: Minimum 1,000 ohms Load Resistance Power Supply Range 0 to 30 AC (18 to 30 DC), Class Power Consumption Warm-up Time Air Flow Range Duct Probe Material Housing Material Dimensions (H x W x D) Shipping Weight Agency Listings <.5 W Average, 4.1 A < 5 Minutes 0 to 7,500 ft/minute (0 to,86 m/minute) Duct Probe Meets Plenum Rating Requirements of UL 1995, Heating and Cooling Equipment ABS Plastic 3-5/3 x 3-3/16 x 8 in. (80 x 81 x 04 mm) 0.3 lb (140g) UL Listed, CCN XAPX (US) and XAPX7 (Canada); EMC Directive (CE Mark), 89/336/EEC; FCC and DOC Compliant The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. Controls Group 507 E. Michigan Street P.O. Box 43 Milwaukee, WI 5301 Printed in U.S.A 6 CD-Pxx-00-0 Series Duct Mount CO Transmitter Installation Instructions